<template>
	<div class="child1">
		<h3>子组件1</h3>
		<h4>玩具：{{ toy }}</h4>
		<h4>书籍：{{ book }} 本</h4>
		<button @click="minusHouse($parent)">干掉父亲的一套房产</button>
	</div>
</template>

<script setup lang="ts" name="Child1">
import { ref } from "vue";
// 数据
let toy = ref('奥特曼')
let book = ref(3)

// 方法
function minusHouse(parent: any) {
	parent.house -= 1
}

// 把数据交给外部
defineExpose({ toy, book })

</script>

<style scoped>
.child1 {
	margin-top: 20px;
	background-color: skyblue;
	padding: 20px;
	border-radius: 10px;
	box-shadow: 0 0 10px black;
}
</style>
